hutchins



` T. W. S. HUTCHINS.

MUFFLE FURNCE.

APPLICATION FILED ocT. 15. 19m.

Patented Dec. 23, 1919.

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INV ENTOR Mmmm' T. W. S. HUTCHINS.

MUFFLE FURNACE.v

APPLICATION man oc. 15. ma.

Patented Dec. 23,1919.

2 SHEETS-SHEET 2.

INVENTOR TWSf/uoZ/zlms, HY We @MM ATTORNEY Sil l PATNT onirica. i

THOMAS WILLIAM STAINER HUTGHLIN S, .OF MIDDLEWICI-I, ENGLAND.

Murrina-nommen.

To all 'whom t may concern.'

Be it known that i, THOMAS WILLIAM @fransen liu'rcrirns, of Electro Bleach and ly-Froducts Limited, Middlewich, in the county of Chester, England, a subject of the King of Great Britain and Ireland, have invented certain new and useful Improvements Relating to Mums-Furnaces, of which the following is a specification.

This invention relates to mufiie furnaces of the type in which a gradual increase and gradual reduction in temperature is effected for the drying and heat treatment, for example, of carbon blocks for use in the metallurgical, chemical and electrical industries.

The object of the invention is to provide an improved form and arrangement of the furnace with its gas producer, which shall be very effective in use, economical to construct and occupy a minimum iioorspace.

'lihe invention comprises a furnace of circular or approximately circular form, with a gas producer located at the center of the furnace and with a series of separate chambers, each containing a muiiie, around said producer, means being provided for the connection of the chambers with each other, with the producer and with air inlets, so that each chamber in turn serves as the coinw bustion area and as a regenerative area by its connection with the flue for the outflow of hot gases from the combustion area, or with the air supply to that area.

Referring to the accompanying sheet of explanatory drawings Figure l is a sectional elevation and Fig. 2 a half sectional plan, of a muflie furnace constructed in accordance with this invention.

Fig. 3 is a section of the upper part of the furnace on the line A B of Fig. 2.

The same reference letters in the diierent views indicate the same or similar parts.

'llhe inutiles as a to a may be arranged vertically as shown, or otherwise, the whole series being adapted to form one battery with a continuous circular external wall as b. A gas producer c is arranged at the center of the mufle chambers and means are provided for connecting said producer with each inutile chamber. For example, the gas connections may be between the upper por tion of the producer and the inutile chambers as shown in Fig. 3, and have suitable valves d therein. A central division wall or battle f may cause the hot gases to pass Specification of Letters IEatent.

.Application lcd Gctober i5,

of muff'le chambers.

Patented Dec. 23, 1919.

isis. serial no. 258,242.

down one side of each chamber and up the other-side. The external wall of the producer forms the internal wall of the series A port g serves both for the admission of air to and the outflow of the waste gases from each chamber, a valve gf controlling the air and a valve g2 the flue connection. The ducts or communications between the respective mufiie chambers are controlled by valves as c.

if, in a series or battery of six muitles as illustrated, with their respective chambers, the first muffie o of the series is open for the withdrawal of its contents and for recharging, and the chamber of the fourth mufiie' a4, is the combustion area, gas and air would be admitted in the required roportion to such fourth chamber, the va ves 0l and e of that chamber being open and the valves g and g2 closed. Before admission to such chamber theair supply would be caused to pass through the chambers of the second and third muiiles, being admit-- ted by the valve g of the chamber of the inutile a2, and passing through the open valve c of the mufiie chamber a3 thence through such chamber a3 and the valve e of the mufHe chamber a4 where it meets and supports the combustion of the producer gas co-ming through the valve d of the said chamber a4.

The hot gaseous products of combustion in passing from the chamber a4 to the flue would flow through the chambers of the mufiies a5 and a and pass out by the valve g2 of the chamber of the muiiie a6.

The valves Z of all the chambers but the one containing the mufiie a4 will be closed, and all the valves c will be open, except the two in connection with the chamber of the mufiie a. After working under such conditions for a given time, depending upon requirements, the valves are adjusted or moved so that the fifth chamber becomes the combustion area, the third and fourth chambers, the air pre-heating areas, and the sixth and iirst chambers are connected to the iiue. The second muifle is then cut out of the series and can be discharged of its contents and re-charged. Each muffie and its chamber is in turn made to serve `the respective functions forming the complete cycle.

The various pipe and iue connections can be arranged beneath the Hoor level or otherwise, and the controlling valves yor their equivalent are conveniently disposed for manipulation.

Having now described my invention what IV claim as new and desire to secure by Letters Patent is l. In mulile furnaces, the combination with a gas producer, of a series of intercommunicating chambers surrounding said producer, a mullle in each of the said chambers, and means consisting of ducts between the chambers with controlling valves therein whereby Veach chamber in turn is made to serve as the combustion area and as a regenerative area, as set vforth.

'2. In muiie furnaces, the combination with a gas producer, of a series of chambers surrounding said producer, ducts putting the said chambers into inter-communication, a valve in each of said ducts, a mufie in each chamber, a duct between each chamber and the producer, a valve in each of said ducts, a port for each chamber serving both for the inflow of air to and the outk flow of waste gases from the chamber, and an air control valve and a waste gas control valve for each of said ports, as set forth.

In testimony whereof I have signed my name to this specification.

THOMAS WILLIAM STAINER HU'ICHINS. 

